fix: mostrar Google Ads desde ad_daily cuando kpi_weekly está vacío

kpi_weekly es una MV de solo lectura sin canales paid; canal/seguimiento
ahora hacen fallback a ad_daily. Bump Google Ads API a v21 en sync.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/dashboard/kpis/canal/[channel]/page.tsx

@@ -5,10 +5,12 @@ import { redirect } from 'next/navigation';
 import { resolveActiveTenant, restGet } from '@/lib/tenant-context';
 import { isAgencyRole, userRole } from '@/lib/agency';
 import {
+  AdDailyRow,
   KpiWeeklyRow,
   buildChannelSeries,
   formatEur,
   formatNum,
+  resolveWeeklyRows,
 } from '@/lib/metrics';
 import { ArrowLeft } from 'lucide-react';
 
@@ -40,20 +42,33 @@ export default async function CanalDashPage({
   }
 
   let weekly: KpiWeeklyRow[] = [];
+  let daily: AdDailyRow[] = [];
   if (agency && ctx.viaView && ctx.tenantId) {
     const tid = encodeURIComponent(ctx.tenantId);
-    const w = await restGet<KpiWeeklyRow[]>(
-      `/rest/v1/kpi_weekly?tenant_id=eq.${tid}&select=*&order=week.asc`
-    );
+    const [w, d] = await Promise.all([
+      restGet<KpiWeeklyRow[]>(
+        `/rest/v1/kpi_weekly?tenant_id=eq.${tid}&select=*&order=week.asc`
+      ),
+      restGet<AdDailyRow[]>(
+        `/rest/v1/ad_daily?tenant_id=eq.${tid}&select=*&order=date.desc&limit=5000`
+      ),
+    ]);
     weekly = w.data || [];
+    daily = d.data || [];
   } else {
-    const { data } = await supabase
-      .from('kpi_weekly')
-      .select('*')
-      .order('week', { ascending: true });
-    weekly = (data as KpiWeeklyRow[]) || [];
+    const [{ data: w }, { data: d }] = await Promise.all([
+      supabase.from('kpi_weekly').select('*').order('week', { ascending: true }),
+      supabase
+        .from('ad_daily')
+        .select('*')
+        .order('date', { ascending: false })
+        .limit(5000),
+    ]);
+    weekly = (w as KpiWeeklyRow[]) || [];
+    daily = (d as AdDailyRow[]) || [];
   }
 
+  weekly = resolveWeeklyRows(weekly, daily);
   const series = buildChannelSeries(weekly);
   const points = series.points.filter((p) => p.channel === channel);
   const spend = points.reduce((a, p) => a + p.spend, 0);

src/app/dashboard/kpis/page.tsx

@@ -8,9 +8,9 @@ import {
   KpiWeeklyRow,
   buildChannelSeries,
   buildComparisons,
+  resolveWeeklyRows,
   sumDaily,
   sumWeekly,
-  weeklyFromDaily,
 } from '@/lib/metrics';
 import { isAgencyRole, userRole } from '@/lib/agency';
 
@@ -65,13 +65,7 @@ export default async function KpisPage() {
     daily = (d as AdDailyRow[]) || [];
   }
 
-  // kpi_weekly is often a stale MV — prefer ad_daily when it has more signal
-  const fromDaily = weeklyFromDaily(daily);
-  const weeklySpend = weekly.reduce((a, r) => a + Number(r.total_spend || 0), 0);
-  const dailySpend = daily.reduce((a, r) => a + Number(r.spend || 0), 0);
-  if (fromDaily.length && dailySpend >= weeklySpend) {
-    weekly = fromDaily;
-  }
+  weekly = resolveWeeklyRows(weekly, daily);
 
   const comparisons = buildComparisons(weekly);
   const month =